package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.PasswordConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.EmployeeDTO;
import com.sky.dto.EmployeeLoginDTO;
import com.sky.dto.EmployeePageQueryDTO;
import com.sky.entity.Employee;
import com.sky.exception.AccountLockedException;
import com.sky.exception.AccountNotFoundException;
import com.sky.exception.PasswordErrorException;
import com.sky.mapper.EmployeeMapper;
import com.sky.result.PageResult;
import com.sky.service.EmployeeService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.DigestUtils;

import java.time.LocalDateTime;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        password = DigestUtils.md5DigestAsHex(password.getBytes());
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (StatusConstant.DISABLE.equals(employee.getStatus())) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    /**
     * 新增员工
     *
     * @param employeeDTO
     */
    @Override
    public void add(EmployeeDTO employeeDTO) {
        System.out.println("3、Service获取当前线程ID：" + Thread.currentThread().getId());
        //1、将DTO转换为实体对象
        Employee employee = new Employee();
        BeanUtils.copyProperties(employeeDTO, employee);

        //2、填充dto中没有的字段
        employee.setPassword(DigestUtils.md5DigestAsHex(PasswordConstant.DEFAULT_PASSWORD.getBytes()));
        employee.setStatus(StatusConstant.ENABLE);

        /*employee.setCreateUser(BaseContext.getCurrentId());
        employee.setCreateTime(LocalDateTime.now());
        employee.setUpdateUser(BaseContext.getCurrentId());
        employee.setUpdateTime(LocalDateTime.now());*/

        //3、将实体对象保存到数据库
        this.employeeMapper.save(employee);
    }

    /**
     * 分页查询员工信息
     *
     * @param pageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQuery(EmployeePageQueryDTO pageQueryDTO) {
        //1、使用PageHelper设置分页参数（page、pagesize、order）
        PageHelper.startPage(pageQueryDTO.getPage(), pageQueryDTO.getPageSize(), "create_time desc");

        //2、分页查询（select * from employee limit 0,10 order by create_time desc）
        Page<Employee> page = this.employeeMapper.page(pageQueryDTO);

        //3、封装结果集
        return new PageResult(page.getTotal(),page.getResult());
    }

    /**
     * 启用/禁用员工
     *
     * @param id
     * @param status
     */
    @Override
    public void startOrStop(Long id, Integer status) {
        // 1、将id、status封装到对象中
        Employee employee = Employee.builder()
                .id(id)
                .status(status)
                /*.updateTime(LocalDateTime.now())
                .updateUser(BaseContext.getCurrentId())*/
                .build();

        // 2、根据对象修改员工状态
        this.employeeMapper.updateById(employee);
    }

    /**
     * 根据ID查询员工信息
     *
     * @param id
     * @return
     */
    @Override
    public Employee queryById(Long id) {
        Employee employee = this.employeeMapper.selectById(id);
        employee.setPassword("******");
        return employee;
    }

    /**
     * 根据ID修改员工信息
     *
     * @param employeeDTO
     */
    @Override
    public void update(EmployeeDTO employeeDTO) {
        //1、将DTO转换为实体对象
        Employee employee = new Employee();
        BeanUtils.copyProperties(employeeDTO, employee);

        //2、设置默认信息
        /*employee.setUpdateTime(LocalDateTime.now());
        employee.setUpdateUser(BaseContext.getCurrentId());*/

        //3、修改员工信息
        employeeMapper.updateById(employee);
    }

}
